Caerphilly

Stay up to date with the latest weather in Caerphilly. In this section, you'll find current data, forecasts, and helpful charts to plan your day.

The climate in Caerphilly, like much of the United Kingdom, is characterized as temperate maritime. This means there are no extreme temperatures: summers are usually warm but not sweltering, and winters are mild without severe frosts. Throughout the year, four seasons are clearly visible, each with its own weather features, allowing you to plan your trip based on temperature and activity preferences.

The summer months, from June to August, are the warmest, with average temperatures around 14.5-16.1°C and maximums reaching a comfortable 18-20°C. Winters, from December to February, are quite cool, with average temperatures staying around 4.5-5.9°C. Spring and autumn are transitional seasons with gradual temperature changes. A characteristic feature of the weather in Caerphilly is fairly frequent precipitation throughout the year. Although the total monthly rainfall is low (averaging 2-4 mm), the number of rainy days is significant, ranging from 12 to 18 days per month. This suggests frequent but usually light rain or drizzle, especially in March, October, and December.

Caerphilly experiences a temperate climate with distinct seasons, offering various temperature conditions throughout the year. The warmest month is usually July, when the average temperature is 16.1°C, and daily highs reach an average of 19.7°C. August shows similar figures, with an average temperature of 15.9°C. The coldest month is typically January, when the average temperature drops to 4.5°C, and nighttime lows can reach 2.0°C, making it the coolest period of the year.

Summer months in Caerphilly, covering June, July, and August, are characterized by pleasantly warm weather. Daytime temperatures during this period range from an average of 18.2°C in June to 19.7°C in July, creating comfortable conditions for outdoor activities. Nights remain relatively mild, with minimum temperatures around 10.8°C - 12.6°C. Winter, from December to February, brings cool weather. Average daytime temperatures in the winter months stay between 6.9°C and 8.2°C, while nighttime temperatures can drop to 2.0°C - 3.8°C. Although temperatures approach the freezing point, severe and prolonged frosts are not typical for this region.

Spring (March-May) and autumn (September-November) months serve as transitional periods with gradual temperature changes. Spring sees a steady warming trend, as average temperatures rise from 6.3°C in March to 11.4°C in May. In autumn, conversely, there is a gradual cooling: from 13.9°C in September to 7.5°C in November. Daily temperature fluctuations are most noticeable in late spring and early summer, when the difference between daytime highs and nighttime lows can reach 7-8°C (for example, in May the difference is 8°C, from 7.4°C to 15.4°C). In winter months, these fluctuations are less pronounced, at around 4-5°C.

In Caerphilly, precipitation falls quite regularly throughout the year, making it difficult to define a distinct dry or rainy season. Total monthly rainfall is low, indicating that while rain is frequent, it is usually light, often appearing as drizzle or mist.

Judging by the number of rainy days, the wettest month is March, with precipitation observed on average for 18 days. October and December follow closely with 17 rainy days each. In terms of total volume (about 4 mm per month), these months, as well as February, September, and November, are the wettest. The lowest amount of precipitation, around 2 mm, is typical for April and June. April also stands out as the month with the fewest rainy days—averaging 12.

Precipitation in Caerphilly is primarily light or moderate rain. Given the low average temperatures in winter, especially in January (minimum around 2.0°C) and February (minimum around 2.8°C), as well as December, some precipitation may fall as sleet or frost, although the data focuses on the number of "wet days" without specifying the type of precipitation. Summer months like July and August also have a significant number of rainy days (13-14), but with a total volume of about 3 mm, suggesting periodic but not intense rain.

When planning a trip to Caerphilly, it’s worth preparing for the changeable weather typical of the United Kingdom. Regardless of the time of year, layering is key, as temperatures can change throughout the day. Given the high number of rainy days (from 12 to 18 per month) all year round, even with low rainfall, a waterproof jacket or raincoat and an umbrella will be indispensable. Don't forget comfortable waterproof shoes, as you'll likely want to explore the town and its surroundings on foot.

In the colder months, from about October to March, when average temperatures range from 4.5°C to 11°C and maximums rarely rise above 13-14°C, you'll need warm clothing. Bring sweaters, a fleece, and perhaps thermal underwear for extra comfort, along with a warm hat, scarf, and gloves. Your outerwear should not only be warm but also reliably protect against wind and moisture, as the weather can be quite damp and chilly.

During the warmer period, from April to September, when average temperatures vary from 8°C to 16°C and maximums can reach 18-20°C, you can dress more lightly. However, the principle of layering still applies: T-shirts, light jumpers, and cardigans will come in handy. Even in summer, evenings can be cool, and a light jacket or windbreaker won't hurt. Remember that rain is possible during this time too, so a compact waterproof jacket or umbrella will be very useful. On sunny days, especially in the height of summer, sunscreen and sunglasses may be needed.